CINXE.COM

<!doctype html> <html class="no-js" lang="en" data-content_root="../"> <head><meta charset="utf-8"/> <meta name="viewport" content="width=device-width,initial-scale=1"/> <meta name="color-scheme" content="light dark"><meta name="viewport" content="width=device-width, initial-scale=1" /> <link rel="index" title="Index" href="../genindex.html" /><link rel="search" title="Search" href="../search.html" /><link rel="next" title="gevent.hub - The Event Loop and the Hub" href="gevent.hub.html" /><link rel="prev" title="gevent.local – Greenlet-local objects" href="gevent.local.html" />  <title>gevent.lock – Locking primitives - gevent 24.11.2.dev0 documentation</title> <link rel="stylesheet" type="text/css" href="../_static/pygments.css?v=a3258c64" /> <link rel="stylesheet" type="text/css" href="../_static/styles/furo.css?v=354aac6f" /> <link rel="stylesheet" type="text/css" href="../_static/styles/furo-extensions.css?v=302659d7" /> <link rel="stylesheet" type="text/css" href="../_static/custom.css?v=e405f49d" /> <style> body { --color-code-background: #eeeedd; --color-code-foreground: black; --color-brand-primary: #7c9a5e; --color-brand-content: #7c9a5e; --color-foreground-border: #b7d897; --font-stack: "SF Pro",-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji"; --font-stack--monospace: "JetBrainsMono", "JetBrains Mono", "JetBrains Mono Regular", "JetBrainsMono-Regular", ui-monospace, profont, monospace; } @media not print { body[data-theme="dark"] { --color-code-background: #202020; --color-code-foreground: #d0d0d0; } @media (prefers-color-scheme: dark) { body:not([data-theme="light"]) { --color-code-background: #202020; --color-code-foreground: #d0d0d0; } } } </style><script async type="text/javascript" src="/_/static/javascript/readthedocs-addons.js"></script><meta name="readthedocs-project-slug" content="python-gevent" /><meta name="readthedocs-version-slug" content="latest" /><meta name="readthedocs-resolver-filename" content="/api/gevent.lock.html" /><meta name="readthedocs-http-status" content="200" /></head> <body> <script> document.body.dataset.theme = localStorage.getItem("theme") || "auto"; </script> <svg xmlns="http://www.w3.org/2000/svg" style="display: none;"> <symbol id="svg-toc" viewBox="0 0 24 24"> <title>Contents</title> <svg stroke="currentColor" fill="currentColor" stroke-width="0" viewBox="0 0 1024 1024"> <path d="M408 442h480c4.4 0 8-3.6 8-8v-56c0-4.4-3.6-8-8-8H408c-4.4 0-8 3.6-8 8v56c0 4.4 3.6 8 8 8zm-8 204c0 4.4 3.6 8 8 8h480c4.4 0 8-3.6 8-8v-56c0-4.4-3.6-8-8-8H408c-4.4 0-8 3.6-8 8v56zm504-486H120c-4.4 0-8 3.6-8 8v56c0 4.4 3.6 8 8 8h784c4.4 0 8-3.6 8-8v-56c0-4.4-3.6-8-8-8zm0 632H120c-4.4 0-8 3.6-8 8v56c0 4.4 3.6 8 8 8h784c4.4 0 8-3.6 8-8v-56c0-4.4-3.6-8-8-8zM115.4 518.9L271.7 642c5.8 4.6 14.4.5 14.4-6.9V388.9c0-7.4-8.5-11.5-14.4-6.9L115.4 505.1a8.74 8.74 0 0 0 0 13.8z"/> </svg> </symbol> <symbol id="svg-menu" viewBox="0 0 24 24"> <title>Menu</title> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather-menu"> <line x1="3" y1="12" x2="21" y2="12"></line> <line x1="3" y1="6" x2="21" y2="6"></line> <line x1="3" y1="18" x2="21" y2="18"></line> </svg> </symbol> <symbol id="svg-arrow-right" viewBox="0 0 24 24"> <title>Expand</title> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather-chevron-right"> <polyline points="9 18 15 12 9 6"></polyline> </svg> </symbol> <symbol id="svg-sun" viewBox="0 0 24 24"> <title>Light mode</title> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1" stroke-linecap="round" stroke-linejoin="round" class="feather-sun"> <circle cx="12" cy="12" r="5"></circle> <line x1="12" y1="1" x2="12" y2="3"></line> <line x1="12" y1="21" x2="12" y2="23"></line> <line x1="4.22" y1="4.22" x2="5.64" y2="5.64"></line> <line x1="18.36" y1="18.36" x2="19.78" y2="19.78"></line> <line x1="1" y1="12" x2="3" y2="12"></line> <line x1="21" y1="12" x2="23" y2="12"></line> <line x1="4.22" y1="19.78" x2="5.64" y2="18.36"></line> <line x1="18.36" y1="5.64" x2="19.78" y2="4.22"></line> </svg> </symbol> <symbol id="svg-moon" viewBox="0 0 24 24"> <title>Dark mode</title> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1" stroke-linecap="round" stroke-linejoin="round" class="icon-tabler-moon"> <path stroke="none" d="M0 0h24v24H0z" fill="none" /> <path d="M12 3c.132 0 .263 0 .393 0a7.5 7.5 0 0 0 7.92 12.446a9 9 0 1 1 -8.313 -12.454z" /> </svg> </symbol> <symbol id="svg-sun-with-moon" viewBox="0 0 24 24"> <title>Auto light/dark, in light mode</title> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1" stroke-linecap="round" stroke-linejoin="round" class="icon-custom-derived-from-feather-sun-and-tabler-moon"> <path style="opacity: 50%" d="M 5.411 14.504 C 5.471 14.504 5.532 14.504 5.591 14.504 C 3.639 16.319 4.383 19.569 6.931 20.352 C 7.693 20.586 8.512 20.551 9.25 20.252 C 8.023 23.207 4.056 23.725 2.11 21.184 C 0.166 18.642 1.702 14.949 4.874 14.536 C 5.051 14.512 5.231 14.5 5.411 14.5 L 5.411 14.504 Z"/> <line x1="14.5" y1="3.25" x2="14.5" y2="1.25"/> <line x1="14.5" y1="15.85" x2="14.5" y2="17.85"/> <line x1="10.044" y1="5.094" x2="8.63" y2="3.68"/> <line x1="19" y1="14.05" x2="20.414" y2="15.464"/> <line x1="8.2" y1="9.55" x2="6.2" y2="9.55"/> <line x1="20.8" y1="9.55" x2="22.8" y2="9.55"/> <line x1="10.044" y1="14.006" x2="8.63" y2="15.42"/> <line x1="19" y1="5.05" x2="20.414" y2="3.636"/> <circle cx="14.5" cy="9.55" r="3.6"/> </svg> </symbol> <symbol id="svg-moon-with-sun" viewBox="0 0 24 24"> <title>Auto light/dark, in dark mode</title> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1" stroke-linecap="round" stroke-linejoin="round" class="icon-custom-derived-from-feather-sun-and-tabler-moon"> <path d="M 8.282 7.007 C 8.385 7.007 8.494 7.007 8.595 7.007 C 5.18 10.184 6.481 15.869 10.942 17.24 C 12.275 17.648 13.706 17.589 15 17.066 C 12.851 22.236 5.91 23.143 2.505 18.696 C -0.897 14.249 1.791 7.786 7.342 7.063 C 7.652 7.021 7.965 7 8.282 7 L 8.282 7.007 Z"/> <line style="opacity: 50%" x1="18" y1="3.705" x2="18" y2="2.5"/> <line style="opacity: 50%" x1="18" y1="11.295" x2="18" y2="12.5"/> <line style="opacity: 50%" x1="15.316" y1="4.816" x2="14.464" y2="3.964"/> <line style="opacity: 50%" x1="20.711" y1="10.212" x2="21.563" y2="11.063"/> <line style="opacity: 50%" x1="14.205" y1="7.5" x2="13.001" y2="7.5"/> <line style="opacity: 50%" x1="21.795" y1="7.5" x2="23" y2="7.5"/> <line style="opacity: 50%" x1="15.316" y1="10.184" x2="14.464" y2="11.036"/> <line style="opacity: 50%" x1="20.711" y1="4.789" x2="21.563" y2="3.937"/> <circle style="opacity: 50%" cx="18" cy="7.5" r="2.169"/> </svg> </symbol> <symbol id="svg-pencil" viewBox="0 0 24 24"> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1" stroke-linecap="round" stroke-linejoin="round" class="icon-tabler-pencil-code"> <path d="M4 20h4l10.5 -10.5a2.828 2.828 0 1 0 -4 -4l-10.5 10.5v4" /> <path d="M13.5 6.5l4 4" /> <path d="M20 21l2 -2l-2 -2" /> <path d="M17 17l-2 2l2 2" /> </svg> </symbol> <symbol id="svg-eye" viewBox="0 0 24 24"> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1" stroke-linecap="round" stroke-linejoin="round" class="icon-tabler-eye-code"> <path stroke="none" d="M0 0h24v24H0z" fill="none" /> <path d="M10 12a2 2 0 1 0 4 0a2 2 0 0 0 -4 0" /> <path d="M11.11 17.958c-3.209 -.307 -5.91 -2.293 -8.11 -5.958c2.4 -4 5.4 -6 9 -6c3.6 0 6.6 2 9 6c-.21 .352 -.427 .688 -.647 1.008" /> <path d="M20 21l2 -2l-2 -2" /> <path d="M17 17l-2 2l2 2" /> </svg> </symbol> </svg> <input type="checkbox" class="sidebar-toggle" name="__navigation" id="__navigation"> <input type="checkbox" class="sidebar-toggle" name="__toc" id="__toc"> <label class="overlay sidebar-overlay" for="__navigation"> <div class="visually-hidden">Hide navigation sidebar</div> </label> <label class="overlay toc-overlay" for="__toc"> <div class="visually-hidden">Hide table of contents sidebar</div> </label> <a class="skip-to-content muted-link" href="#furo-main-content">Skip to content</a> <div class="page"> <header class="mobile-header"> <div class="header-left"> <label class="nav-overlay-icon" for="__navigation"> <div class="visually-hidden">Toggle site navigation sidebar</div> <i class="icon"><svg><use href="#svg-menu"></use></svg></i> </label> </div> <div class="header-center"> <a href="../contents.html"><div class="brand">gevent 24.11.2.dev0 documentation</div></a> </div> <div class="header-right"> <div class="theme-toggle-container theme-toggle-header"> <button class="theme-toggle"> <div class="visually-hidden">Toggle Light / Dark / Auto color theme</div> <svg class="theme-icon-when-auto-light"><use href="#svg-sun-with-moon"></use></svg> <svg class="theme-icon-when-auto-dark"><use href="#svg-moon-with-sun"></use></svg> <svg class="theme-icon-when-dark"><use href="#svg-moon"></use></svg> <svg class="theme-icon-when-light"><use href="#svg-sun"></use></svg> </button> </div> <label class="toc-overlay-icon toc-header-icon" for="__toc"> <div class="visually-hidden">Toggle table of contents sidebar</div> <i class="icon"><svg><use href="#svg-toc"></use></svg></i> </label> </div> </header> <aside class="sidebar-drawer"> <div class="sidebar-container"> <div class="sidebar-sticky"><a class="sidebar-brand" href="../contents.html"> <div class="sidebar-logo-container"> <img class="sidebar-logo" src="../_static/5564530.png" alt="Logo"/> </div> </a><form class="sidebar-search-container" method="get" action="../search.html" role="search"> <input class="sidebar-search" placeholder="Search" name="q" aria-label="Search"> <input type="hidden" name="check_keywords" value="yes"> <input type="hidden" name="area" value="default"> </form> <div id="searchbox"></div><div class="sidebar-scroll"><div class="sidebar-tree"> <ul> <li class="toctree-l1"><a class="reference internal" href="../install.html">Installation and Requirements</a></li> <li class="toctree-l1 has-children"><a class="reference internal" href="../changelog.html">Changelog</a><input class="toctree-checkbox" id="toctree-checkbox-1" name="toctree-checkbox-1" role="switch" type="checkbox"/><label for="toctree-checkbox-1"><div class="visually-hidden">Toggle navigation of Changelog</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul> <li class="toctree-l2"><a class="reference internal" href="../changelog_1_5.html">Changes for 1.5</a></li> <li class="toctree-l2"><a class="reference internal" href="../changelog_1_4.html">Changes for 1.4</a></li> <li class="toctree-l2"><a class="reference internal" href="../changelog_1_3.html">Changes for 1.3</a></li> <li class="toctree-l2"><a class="reference internal" href="../changelog_1_2.html">Changes for 1.2</a></li> <li class="toctree-l2"><a class="reference internal" href="../changelog_1_1.html">Changes for 1.1</a></li> <li class="toctree-l2"><a class="reference internal" href="../changelog_1_0.html">Changes for 1.0</a></li> <li class="toctree-l2"><a class="reference internal" href="../changelog_pre.html">Changes before gevent 1.0</a></li> </ul> </li> <li class="toctree-l1"><a class="reference internal" href="../intro.html">Introduction</a></li> <li class="toctree-l1"><a class="reference internal" href="gevent.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent</span></code> – common functions</a></li> <li class="toctree-l1"><a class="reference internal" href="gevent.greenlet.html">Greenlet Objects</a></li> <li class="toctree-l1"><a class="reference internal" href="../servers.html">Implementing servers</a></li> <li class="toctree-l1 has-children"><a class="reference internal" href="../dns.html">Name Resolution (DNS)</a><input class="toctree-checkbox" id="toctree-checkbox-2" name="toctree-checkbox-2" role="switch" type="checkbox"/><label for="toctree-checkbox-2"><div class="visually-hidden">Toggle navigation of Name Resolution (DNS)</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul> <li class="toctree-l2"><a class="reference internal" href="gevent.resolver.thread.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.resolver.thread</span></code> – thread based hostname resolver</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.resolver.ares.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.resolver.ares</span></code> – c-ares based hostname resolver</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.resolver.dnspython.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.resolver.dnspython</span></code> – Pure Python hostname resolver</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.resolver.blocking.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.resolver.blocking</span></code> – Non-cooperative resolver</a></li> </ul> </li> <li class="toctree-l1"><a class="reference internal" href="../monitoring.html">Monitoring and Debugging gevent Applications</a></li> <li class="toctree-l1"><a class="reference internal" href="../loop_impls.html">Event Loop Implementations: libuv and libev</a></li> <li class="toctree-l1"><a class="reference internal" href="../configuration.html">Configuring gevent</a></li> </ul> <ul class="current"> <li class="toctree-l1 current has-children"><a class="reference internal" href="index.html">API reference</a><input checked="" class="toctree-checkbox" id="toctree-checkbox-3" name="toctree-checkbox-3" role="switch" type="checkbox"/><label for="toctree-checkbox-3"><div class="visually-hidden">Toggle navigation of API reference</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul class="current"> <li class="toctree-l2"><a class="reference internal" href="gevent.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent</span></code> – common functions</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.timeout.html">Cooperative Timeouts Using <code class="docutils literal notranslate"><span class="pre">gevent.Timeout</span></code></a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.greenlet.html">Greenlet Objects</a></li> <li class="toctree-l2 has-children"><a class="reference internal" href="gevent.socket.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.socket</span></code> – Cooperative low-level networking interface</a><input class="toctree-checkbox" id="toctree-checkbox-4" name="toctree-checkbox-4" role="switch" type="checkbox"/><label for="toctree-checkbox-4"><div class="visually-hidden">Toggle navigation of gevent.socket – Cooperative low-level networking interface</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul> <li class="toctree-l3"><a class="reference internal" href="gevent._socket3.html">Python 3 interface</a></li> </ul> </li> <li class="toctree-l2"><a class="reference internal" href="gevent.ssl.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.ssl</span></code> – Secure Sockets Layer (SSL/TLS) module</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.select.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.select</span></code> – Waiting for I/O completion</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.selectors.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.selectors</span></code> – High-level IO Multiplexing</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.event.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.event</span></code> – Notifications of multiple listeners</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.queue.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.queue</span></code> – Synchronized queues</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.local.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.local</span></code> – Greenlet-local objects</a></li> <li class="toctree-l2 current"><a class="current reference internal" href="#"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.lock</span></code> – Locking primitives</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.hub.html"><code class="docutils literal notranslate"><span class="pre">gevent.hub</span></code> - The Event Loop and the Hub</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.core.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.core</span></code> - (deprecated) event loop abstraction</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent</span></code> – common functions</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.backdoor.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.backdoor</span></code> – Interactive greenlet-based network console that can be used in any process</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.baseserver.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.baseserver</span></code> – Base class for implementing servers</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.builtins.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.builtins</span></code> – gevent friendly implementations of builtin functions</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.contextvars.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.contextvars</span></code> – Cooperative <code class="docutils literal notranslate"><span class="pre">contextvars</span></code></a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.core.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.core</span></code> - (deprecated) event loop abstraction</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.event.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.event</span></code> – Notifications of multiple listeners</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.events.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.events</span></code> – Publish/subscribe event infrastructure</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.exceptions.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.exceptions</span></code> – Exceptions</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.fileobject.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.fileobject</span></code> – Wrappers to make file-like objects cooperative</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.hub.html"><code class="docutils literal notranslate"><span class="pre">gevent.hub</span></code> - The Event Loop and the Hub</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.local.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.local</span></code> – Greenlet-local objects</a></li> <li class="toctree-l2 current current-page"><a class="current reference internal" href="#"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.lock</span></code> – Locking primitives</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.monkey.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.monkey</span></code> – Make the standard library cooperative</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.os.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.os</span></code> – Low-level operating system functions from <code class="xref py py-mod docutils literal notranslate"><span class="pre">os</span></code></a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.pool.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.pool</span></code> – Managing greenlets in a group</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.pywsgi.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.pywsgi</span></code> – A pure-Python, gevent-friendly WSGI server</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.queue.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.queue</span></code> – Synchronized queues</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.resolver.ares.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.resolver.ares</span></code> – c-ares based hostname resolver</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.resolver.blocking.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.resolver.blocking</span></code> – Non-cooperative resolver</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.resolver.dnspython.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.resolver.dnspython</span></code> – Pure Python hostname resolver</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.resolver.thread.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.resolver.thread</span></code> – thread based hostname resolver</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.select.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.select</span></code> – Waiting for I/O completion</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.selectors.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.selectors</span></code> – High-level IO Multiplexing</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.server.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.server</span></code> – TCP/SSL server</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.signal.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.signal</span></code> – Cooperative implementation of special cases of <code class="xref py py-func docutils literal notranslate"><span class="pre">signal.signal()</span></code></a></li> <li class="toctree-l2 has-children"><a class="reference internal" href="gevent.socket.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.socket</span></code> – Cooperative low-level networking interface</a><input class="toctree-checkbox" id="toctree-checkbox-5" name="toctree-checkbox-5" role="switch" type="checkbox"/><label for="toctree-checkbox-5"><div class="visually-hidden">Toggle navigation of gevent.socket – Cooperative low-level networking interface</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul> <li class="toctree-l3"><a class="reference internal" href="gevent._socket3.html">Python 3 interface</a></li> </ul> </li> <li class="toctree-l2"><a class="reference internal" href="gevent.ssl.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.ssl</span></code> – Secure Sockets Layer (SSL/TLS) module</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.subprocess.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.subprocess</span></code> – Cooperative <code class="docutils literal notranslate"><span class="pre">subprocess</span></code> module</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.thread.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.thread</span></code> – Implementation of the standard <code class="xref py py-mod docutils literal notranslate"><span class="pre">thread</span></code> module that spawns greenlets</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.threading.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.threading</span></code> – Implementation of the standard <code class="xref py py-mod docutils literal notranslate"><span class="pre">threading</span></code> using greenlets</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.threadpool.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.threadpool</span></code> - A pool of native threads</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.time.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.time</span></code> – Makes <em>sleep</em> gevent aware</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.util.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.util</span></code> – Low-level utilities</a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.ares.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.ares</span></code> – Backwards compatibility alias for <code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.resolver.cares</span></code></a></li> <li class="toctree-l2"><a class="reference internal" href="gevent.wsgi.html"><code class="docutils literal notranslate"><span class="pre">gevent.wsgi</span></code> – Historical note only; does not exist</a></li> <li class="toctree-l2 has-children"><a class="reference internal" href="../examples/index.html">Examples</a><input class="toctree-checkbox" id="toctree-checkbox-6" name="toctree-checkbox-6" role="switch" type="checkbox"/><label for="toctree-checkbox-6"><div class="visually-hidden">Toggle navigation of Examples</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul> <li class="toctree-l3"><a class="reference internal" href="../examples/concurrent_download.html">Example concurrent_download.py</a></li> <li class="toctree-l3"><a class="reference internal" href="../examples/dns_mass_resolve.html">Example dns_mass_resolve.py</a></li> <li class="toctree-l3"><a class="reference internal" href="../examples/echoserver.html">Example echoserver.py</a></li> <li class="toctree-l3"><a class="reference internal" href="../examples/geventsendfile.html">Example geventsendfile.py</a></li> <li class="toctree-l3"><a class="reference internal" href="../examples/portforwarder.html">Example portforwarder.py</a></li> <li class="toctree-l3"><a class="reference internal" href="../examples/processes.html">Example processes.py</a></li> <li class="toctree-l3"><a class="reference internal" href="../examples/psycopg2_pool.html">Example psycopg2_pool.py</a></li> <li class="toctree-l3"><a class="reference internal" href="../examples/threadpool.html">Example threadpool.py</a></li> <li class="toctree-l3"><a class="reference internal" href="../examples/udp_client.html">Example udp_client.py</a></li> <li class="toctree-l3"><a class="reference internal" href="../examples/udp_server.html">Example udp_server.py</a></li> <li class="toctree-l3"><a class="reference internal" href="../examples/unixsocket_client.html">Example unixsocket_client.py</a></li> <li class="toctree-l3"><a class="reference internal" href="../examples/unixsocket_server.html">Example unixsocket_server.py</a></li> <li class="toctree-l3"><a class="reference internal" href="../examples/webproxy.html">Example webproxy.py</a></li> <li class="toctree-l3"><a class="reference internal" href="../examples/webpy.html">Example webpy.py</a></li> <li class="toctree-l3"><a class="reference internal" href="../examples/wsgiserver.html">Example wsgiserver.py</a></li> <li class="toctree-l3"><a class="reference internal" href="../examples/wsgiserver_ssl.html">Example wsgiserver_ssl.py</a></li> </ul> </li> </ul> </li> </ul> <ul> <li class="toctree-l1 has-children"><a class="reference internal" href="../development/index.html">Development</a><input class="toctree-checkbox" id="toctree-checkbox-7" name="toctree-checkbox-7" role="switch" type="checkbox"/><label for="toctree-checkbox-7"><div class="visually-hidden">Toggle navigation of Development</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul> <li class="toctree-l2"><a class="reference internal" href="../development/getting_started.html">Getting Started</a></li> <li class="toctree-l2"><a class="reference internal" href="../development/installing_from_source.html">Installing From Source</a></li> <li class="toctree-l2"><a class="reference internal" href="../development/running_tests.html">Running Tests</a></li> <li class="toctree-l2"><a class="reference internal" href="../development/ci.html">Continuous integration</a></li> <li class="toctree-l2"><a class="reference internal" href="../development/release_process.html">Release Process</a></li> </ul> </li> </ul> <ul> <li class="toctree-l1"><a class="reference internal" href="../success.html">Success stories</a></li> <li class="toctree-l1"><a class="reference internal" href="../community.html">Community</a></li> <li class="toctree-l1 has-children"><a class="reference internal" href="../older_releases.html">Information About Older Releases</a><input class="toctree-checkbox" id="toctree-checkbox-8" name="toctree-checkbox-8" role="switch" type="checkbox"/><label for="toctree-checkbox-8"><div class="visually-hidden">Toggle navigation of Information About Older Releases</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul> <li class="toctree-l2 has-children"><a class="reference internal" href="../whatsnew_1_5.html">What’s new in gevent 1.5</a><input class="toctree-checkbox" id="toctree-checkbox-9" name="toctree-checkbox-9" role="switch" type="checkbox"/><label for="toctree-checkbox-9"><div class="visually-hidden">Toggle navigation of What’s new in gevent 1.5</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul> <li class="toctree-l3"><a class="reference internal" href="../changelog_1_5.html">Changes for 1.5</a></li> </ul> </li> <li class="toctree-l2 has-children"><a class="reference internal" href="../whatsnew_1_4.html">What’s new in gevent 1.4</a><input class="toctree-checkbox" id="toctree-checkbox-10" name="toctree-checkbox-10" role="switch" type="checkbox"/><label for="toctree-checkbox-10"><div class="visually-hidden">Toggle navigation of What’s new in gevent 1.4</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul> <li class="toctree-l3"><a class="reference internal" href="../changelog_1_4.html">Changes for 1.4</a></li> </ul> </li> <li class="toctree-l2 has-children"><a class="reference internal" href="../whatsnew_1_3.html">What’s new in gevent 1.3</a><input class="toctree-checkbox" id="toctree-checkbox-11" name="toctree-checkbox-11" role="switch" type="checkbox"/><label for="toctree-checkbox-11"><div class="visually-hidden">Toggle navigation of What’s new in gevent 1.3</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul> <li class="toctree-l3"><a class="reference internal" href="../changelog_1_3.html">Changes for 1.3</a></li> </ul> </li> <li class="toctree-l2 has-children"><a class="reference internal" href="../whatsnew_1_2.html">What’s new in gevent 1.2</a><input class="toctree-checkbox" id="toctree-checkbox-12" name="toctree-checkbox-12" role="switch" type="checkbox"/><label for="toctree-checkbox-12"><div class="visually-hidden">Toggle navigation of What’s new in gevent 1.2</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul> <li class="toctree-l3"><a class="reference internal" href="../changelog_1_2.html">Changes for 1.2</a></li> </ul> </li> <li class="toctree-l2 has-children"><a class="reference internal" href="../whatsnew_1_1.html">What’s new in gevent 1.1</a><input class="toctree-checkbox" id="toctree-checkbox-13" name="toctree-checkbox-13" role="switch" type="checkbox"/><label for="toctree-checkbox-13"><div class="visually-hidden">Toggle navigation of What’s new in gevent 1.1</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul> <li class="toctree-l3"><a class="reference internal" href="../changelog_1_1.html">Changes for 1.1</a></li> </ul> </li> <li class="toctree-l2 has-children"><a class="reference internal" href="../whatsnew_1_0.html">What’s new in gevent 1.0</a><input class="toctree-checkbox" id="toctree-checkbox-14" name="toctree-checkbox-14" role="switch" type="checkbox"/><label for="toctree-checkbox-14"><div class="visually-hidden">Toggle navigation of What’s new in gevent 1.0</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul> <li class="toctree-l3"><a class="reference internal" href="../changelog_1_0.html">Changes for 1.0</a></li> </ul> </li> <li class="toctree-l2"><a class="reference internal" href="../changelog_1_5.html">Changes for 1.5</a></li> <li class="toctree-l2"><a class="reference internal" href="../changelog_1_4.html">Changes for 1.4</a></li> <li class="toctree-l2"><a class="reference internal" href="../changelog_1_3.html">Changes for 1.3</a></li> <li class="toctree-l2"><a class="reference internal" href="../changelog_1_2.html">Changes for 1.2</a></li> <li class="toctree-l2"><a class="reference internal" href="../changelog_1_1.html">Changes for 1.1</a></li> <li class="toctree-l2"><a class="reference internal" href="../changelog_1_0.html">Changes for 1.0</a></li> <li class="toctree-l2"><a class="reference internal" href="../changelog_pre.html">Changes before gevent 1.0</a></li> </ul> </li> </ul> </div> </div> </div> </div> </aside> <div class="main"> <div class="content"> <div class="article-container"> <a href="#" class="back-to-top muted-link"> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"> <path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8v12z"></path> </svg> <span>Back to top</span> </a> <div class="content-icon-container"> <div class="theme-toggle-container theme-toggle-content"> <button class="theme-toggle"> <div class="visually-hidden">Toggle Light / Dark / Auto color theme</div> <svg class="theme-icon-when-auto-light"><use href="#svg-sun-with-moon"></use></svg> <svg class="theme-icon-when-auto-dark"><use href="#svg-moon-with-sun"></use></svg> <svg class="theme-icon-when-dark"><use href="#svg-moon"></use></svg> <svg class="theme-icon-when-light"><use href="#svg-sun"></use></svg> </button> </div> <label class="toc-overlay-icon toc-content-icon" for="__toc"> <div class="visually-hidden">Toggle table of contents sidebar</div> <i class="icon"><svg><use href="#svg-toc"></use></svg></i> </label> </div> <article role="main" id="furo-main-content"> <section id="module-gevent.lock"> <span id="gevent-lock-locking-primitives"></span><h1><a class="reference internal" href="#module-gevent.lock" title="gevent.lock"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.lock</span></code></a> – Locking primitives<a class="headerlink" href="#module-gevent.lock" title="Link to this heading">¶</a></h1> <p>Locking primitives.</p> <p>These include semaphores with arbitrary bounds (<a class="reference internal" href="#gevent.lock.Semaphore" title="gevent.lock.Semaphore"><code class="xref py py-class docutils literal notranslate"><span class="pre">Semaphore</span></code></a> and its safer subclass <a class="reference internal" href="#gevent.lock.BoundedSemaphore" title="gevent.lock.BoundedSemaphore"><code class="xref py py-class docutils literal notranslate"><span class="pre">BoundedSemaphore</span></code></a>) and a semaphore with infinite bounds (<a class="reference internal" href="#gevent.lock.DummySemaphore" title="gevent.lock.DummySemaphore"><code class="xref py py-class docutils literal notranslate"><span class="pre">DummySemaphore</span></code></a>), along with a reentrant lock (<a class="reference internal" href="#gevent.lock.RLock" title="gevent.lock.RLock"><code class="xref py py-class docutils literal notranslate"><span class="pre">RLock</span></code></a>) with the same API as <a class="reference external" href="https://docs.python.org/3/library/threading.html#threading.RLock" title="(in Python v3.13)"><code class="xref py py-class docutils literal notranslate"><span class="pre">threading.RLock</span></code></a>.</p> <dl class="py class"> <dt class="sig sig-object py" id="gevent.lock.BoundedSemaphore"> <em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-name descname"><span class="pre">BoundedSemaphore</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">value</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">1</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#gevent.lock.BoundedSemaphore" title="Link to this definition">¶</a></dt> <dd><p>Bases: <code class="xref py py-class docutils literal notranslate"><span class="pre">_AtomicSemaphoreMixin</span></code>, <code class="xref py py-class docutils literal notranslate"><span class="pre">BoundedSemaphore</span></code></p> <p>A bounded semaphore checks to make sure its current value doesn’t exceed its initial value. If it does, <a class="reference external" href="https://docs.python.org/3/library/exceptions.html#ValueError" title="(in Python v3.13)"><code class="xref py py-class docutils literal notranslate"><span class="pre">ValueError</span></code></a> is raised. In most situations semaphores are used to guard resources with limited capacity. If the semaphore is released too many times it’s a sign of a bug.</p> <p>If not given, <em>value</em> defaults to 1.</p> <dl class="py method"> <dt class="sig sig-object py" id="gevent.lock.BoundedSemaphore.acquire"> <span class="sig-name descname"><span class="pre">acquire</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">blocking</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">True</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">timeout</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><a class="reference external" href="https://docs.python.org/3/library/functions.html#bool" title="(in Python v3.13)"><span class="pre">bool</span></a></span></span><a class="headerlink" href="#gevent.lock.BoundedSemaphore.acquire" title="Link to this definition">¶</a></dt> <dd><p>Acquire the semaphore.</p> <div class="admonition note"> <p class="admonition-title">Note</p> <p>If this semaphore was initialized with a <em>value</em> of 0, this method will block forever (unless a timeout is given or blocking is set to false).</p> </div> <dl class="field-list simple"> <dt class="field-odd">Parameters<span class="colon">:</span></dt> <dd class="field-odd"><ul class="simple"> <li><p><strong>blocking</strong> (<a class="reference external" href="https://docs.python.org/3/library/functions.html#bool" title="(in Python v3.13)"><em>bool</em></a>) – If True (the default), this function will block until the semaphore is acquired.</p></li> <li><p><strong>timeout</strong> (<a class="reference external" href="https://docs.python.org/3/library/functions.html#float" title="(in Python v3.13)"><em>float</em></a>) – If given, and <em>blocking</em> is true, specifies the maximum amount of seconds this method will block.</p></li> </ul> </dd> <dt class="field-even">Returns<span class="colon">:</span></dt> <dd class="field-even"><p>A <a class="reference external" href="https://docs.python.org/3/library/functions.html#bool" title="(in Python v3.13)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">bool</span></code></a> indicating whether the semaphore was acquired. If <code class="docutils literal notranslate"><span class="pre">blocking</span></code> is True and <code class="docutils literal notranslate"><span class="pre">timeout</span></code> is None (the default), then (so long as this semaphore was initialized with a size greater than 0) this will always return True. If a timeout was given, and it expired before the semaphore was acquired, False will be returned. (Note that this can still raise a <code class="docutils literal notranslate"><span class="pre">Timeout</span></code> exception, if some other caller had already started a timer.)</p> </dd> </dl> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="gevent.lock.BoundedSemaphore.locked"> <span class="sig-name descname"><span class="pre">locked</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#gevent.lock.BoundedSemaphore.locked" title="Link to this definition">¶</a></dt> <dd><p>Return a boolean indicating whether the semaphore can be acquired (<a class="reference external" href="https://docs.python.org/3/library/constants.html#False" title="(in Python v3.13)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">False</span></code></a> if the semaphore <em>can</em> be acquired). Most useful with binary semaphores (those with an initial value of 1).</p> <dl class="field-list simple"> <dt class="field-odd">Return type<span class="colon">:</span></dt> <dd class="field-odd"><p><a class="reference external" href="https://docs.python.org/3/library/functions.html#bool" title="(in Python v3.13)">bool</a></p> </dd> </dl> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="gevent.lock.BoundedSemaphore.rawlink"> <span class="sig-name descname"><span class="pre">rawlink</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">callback</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#gevent.lock.BoundedSemaphore.rawlink" title="Link to this definition">¶</a></dt> <dd><p>Register a callback to call when this object is ready.</p> <p><em>callback</em> will be called in the <a class="reference internal" href="gevent.hub.html#gevent.hub.Hub" title="gevent.hub.Hub"><code class="xref py py-class docutils literal notranslate"><span class="pre">Hub</span></code></a>, so it must not use blocking gevent API. <em>callback</em> will be passed one argument: this instance.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="gevent.lock.BoundedSemaphore.ready"> <span class="sig-name descname"><span class="pre">ready</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#gevent.lock.BoundedSemaphore.ready" title="Link to this definition">¶</a></dt> <dd><p>Return a boolean indicating whether the semaphore can be acquired (<a class="reference external" href="https://docs.python.org/3/library/constants.html#True" title="(in Python v3.13)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">True</span></code></a> if the semaphore can be acquired).</p> <dl class="field-list simple"> <dt class="field-odd">Return type<span class="colon">:</span></dt> <dd class="field-odd"><p><a class="reference external" href="https://docs.python.org/3/library/functions.html#bool" title="(in Python v3.13)">bool</a></p> </dd> </dl> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="gevent.lock.BoundedSemaphore.release"> <span class="sig-name descname"><span class="pre">release</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#gevent.lock.BoundedSemaphore.release" title="Link to this definition">¶</a></dt> <dd><p>Like <a class="reference internal" href="#gevent.lock.Semaphore.release" title="gevent.lock.Semaphore.release"><code class="xref py py-meth docutils literal notranslate"><span class="pre">Semaphore.release()</span></code></a>, but raises <a class="reference external" href="https://docs.python.org/3/library/exceptions.html#ValueError" title="(in Python v3.13)"><code class="xref py py-class docutils literal notranslate"><span class="pre">ValueError</span></code></a> if the semaphore is being over-released.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="gevent.lock.BoundedSemaphore.unlink"> <span class="sig-name descname"><span class="pre">unlink</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">callback</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#gevent.lock.BoundedSemaphore.unlink" title="Link to this definition">¶</a></dt> <dd><p>Remove the callback set by <a class="reference internal" href="#gevent.lock.BoundedSemaphore.rawlink" title="gevent.lock.BoundedSemaphore.rawlink"><code class="xref py py-meth docutils literal notranslate"><span class="pre">rawlink()</span></code></a></p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="gevent.lock.BoundedSemaphore.wait"> <span class="sig-name descname"><span class="pre">wait</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">timeout</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#gevent.lock.BoundedSemaphore.wait" title="Link to this definition">¶</a></dt> <dd><p>Wait until it is possible to acquire this semaphore, or until the optional <em>timeout</em> elapses.</p> <div class="admonition note"> <p class="admonition-title">Note</p> <p>If this semaphore was initialized with a <em>value</em> of 0, this method will block forever if no timeout is given.</p> </div> <dl class="field-list simple"> <dt class="field-odd">Parameters<span class="colon">:</span></dt> <dd class="field-odd"><p><strong>timeout</strong> (<a class="reference external" href="https://docs.python.org/3/library/functions.html#float" title="(in Python v3.13)"><em>float</em></a>) – If given, specifies the maximum amount of seconds this method will block.</p> </dd> <dt class="field-even">Returns<span class="colon">:</span></dt> <dd class="field-even"><p>A number indicating how many times the semaphore can be acquired before blocking. <em>This could be 0,</em> if other waiters acquired the semaphore.</p> </dd> <dt class="field-odd">Return type<span class="colon">:</span></dt> <dd class="field-odd"><p><a class="reference external" href="https://docs.python.org/3/library/functions.html#int" title="(in Python v3.13)">int</a></p> </dd> </dl> </dd></dl> </dd></dl> <dl class="py class"> <dt class="sig sig-object py" id="gevent.lock.DummySemaphore"> <em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-name descname"><span class="pre">DummySemaphore</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">value</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/gevent/lock.html#DummySemaphore"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#gevent.lock.DummySemaphore" title="Link to this definition">¶</a></dt> <dd><p>Bases: <a class="reference external" href="https://docs.python.org/3/library/functions.html#object" title="(in Python v3.13)"><code class="xref py py-class docutils literal notranslate"><span class="pre">object</span></code></a></p> <p>An object with the same API as <a class="reference internal" href="#gevent.lock.Semaphore" title="gevent.lock.Semaphore"><code class="xref py py-class docutils literal notranslate"><span class="pre">Semaphore</span></code></a>, initialized with “infinite” initial value. None of its methods ever block.</p> <p>This can be used to parameterize on whether or not to actually guard access to a potentially limited resource. If the resource is actually limited, such as a fixed-size thread pool, use a real <a class="reference internal" href="#gevent.lock.Semaphore" title="gevent.lock.Semaphore"><code class="xref py py-class docutils literal notranslate"><span class="pre">Semaphore</span></code></a>, but if the resource is unbounded, use an instance of this class. In that way none of the supporting code needs to change.</p> <p>Similarly, it can be used to parameterize on whether or not to enforce mutual exclusion to some underlying object. If the underlying object is known to be thread-safe itself mutual exclusion is not needed and a <code class="docutils literal notranslate"><span class="pre">DummySemaphore</span></code> can be used, but if that’s not true, use a real <code class="docutils literal notranslate"><span class="pre">Semaphore</span></code>.</p> <div class="versionchanged"> <p><span class="versionmodified changed">Changed in version 1.1rc3: </span>Accept and ignore a <em>value</em> argument for compatibility with Semaphore.</p> </div> <dl class="py method"> <dt class="sig sig-object py" id="gevent.lock.DummySemaphore.acquire"> <span class="sig-name descname"><span class="pre">acquire</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">blocking</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">True</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">timeout</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/gevent/lock.html#DummySemaphore.acquire"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#gevent.lock.DummySemaphore.acquire" title="Link to this definition">¶</a></dt> <dd><p>A DummySemaphore can always be acquired immediately so this always returns True and ignores its arguments.</p> <div class="versionchanged"> <p><span class="versionmodified changed">Changed in version 1.1a1: </span>Always return <em>true</em>.</p> </div> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="gevent.lock.DummySemaphore.locked"> <span class="sig-name descname"><span class="pre">locked</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="../_modules/gevent/lock.html#DummySemaphore.locked"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#gevent.lock.DummySemaphore.locked" title="Link to this definition">¶</a></dt> <dd><p>A DummySemaphore is never locked so this always returns False.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="gevent.lock.DummySemaphore.ready"> <span class="sig-name descname"><span class="pre">ready</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="../_modules/gevent/lock.html#DummySemaphore.ready"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#gevent.lock.DummySemaphore.ready" title="Link to this definition">¶</a></dt> <dd><p>A DummySemaphore is never locked so this always returns True.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="gevent.lock.DummySemaphore.release"> <span class="sig-name descname"><span class="pre">release</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="../_modules/gevent/lock.html#DummySemaphore.release"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#gevent.lock.DummySemaphore.release" title="Link to this definition">¶</a></dt> <dd><p>Releasing a dummy semaphore does nothing.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="gevent.lock.DummySemaphore.wait"> <span class="sig-name descname"><span class="pre">wait</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">timeout</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/gevent/lock.html#DummySemaphore.wait"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#gevent.lock.DummySemaphore.wait" title="Link to this definition">¶</a></dt> <dd><p>Waiting for a DummySemaphore returns immediately.</p> </dd></dl> </dd></dl> <dl class="py class"> <dt class="sig sig-object py" id="gevent.lock.RLock"> <em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-name descname"><span class="pre">RLock</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">hub</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/gevent/lock.html#RLock"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#gevent.lock.RLock" title="Link to this definition">¶</a></dt> <dd><p>Bases: <a class="reference external" href="https://docs.python.org/3/library/functions.html#object" title="(in Python v3.13)"><code class="xref py py-class docutils literal notranslate"><span class="pre">object</span></code></a></p> <p>A mutex that can be acquired more than once by the same greenlet.</p> <p>A mutex can only be locked by one greenlet at a time. A single greenlet can <a class="reference internal" href="#gevent.lock.RLock.acquire" title="gevent.lock.RLock.acquire"><code class="xref py py-obj docutils literal notranslate"><span class="pre">acquire</span></code></a> the mutex as many times as desired, though. Each call to <a class="reference internal" href="#gevent.lock.RLock.acquire" title="gevent.lock.RLock.acquire"><code class="xref py py-obj docutils literal notranslate"><span class="pre">acquire</span></code></a> must be paired with a matching call to <a class="reference internal" href="#gevent.lock.RLock.release" title="gevent.lock.RLock.release"><code class="xref py py-obj docutils literal notranslate"><span class="pre">release</span></code></a>.</p> <p>It is an error for a greenlet that has not acquired the mutex to release it.</p> <p>Instances are context managers.</p> <div class="versionchanged"> <p><span class="versionmodified changed">Changed in version 20.5.1: </span>Add the <code class="docutils literal notranslate"><span class="pre">hub</span></code> argument.</p> </div> <dl class="py method"> <dt class="sig sig-object py" id="gevent.lock.RLock.acquire"> <span class="sig-name descname"><span class="pre">acquire</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">blocking</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">True</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">timeout</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/gevent/lock.html#RLock.acquire"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#gevent.lock.RLock.acquire" title="Link to this definition">¶</a></dt> <dd><p>Acquire the mutex, blocking if <em>blocking</em> is true, for up to <em>timeout</em> seconds.</p> <div class="versionchanged"> <p><span class="versionmodified changed">Changed in version 1.5a4: </span>Added the <em>timeout</em> parameter.</p> </div> <dl class="field-list simple"> <dt class="field-odd">Returns<span class="colon">:</span></dt> <dd class="field-odd"><p>A boolean indicating whether the mutex was acquired.</p> </dd> </dl> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="gevent.lock.RLock.release"> <span class="sig-name descname"><span class="pre">release</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="../_modules/gevent/lock.html#RLock.release"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#gevent.lock.RLock.release" title="Link to this definition">¶</a></dt> <dd><p>Release the mutex.</p> <p>Only the greenlet that originally acquired the mutex can release it.</p> </dd></dl> </dd></dl> <dl class="py class"> <dt class="sig sig-object py" id="gevent.lock.Semaphore"> <em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-name descname"><span class="pre">Semaphore</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">value</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">1</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#gevent.lock.Semaphore" title="Link to this definition">¶</a></dt> <dd><p>Bases: <code class="xref py py-class docutils literal notranslate"><span class="pre">_AtomicSemaphoreMixin</span></code>, <code class="xref py py-class docutils literal notranslate"><span class="pre">Semaphore</span></code></p> <div class="admonition seealso"> <p class="admonition-title">See also</p> <p><a class="reference internal" href="#gevent.lock.BoundedSemaphore" title="gevent.lock.BoundedSemaphore"><code class="xref py py-class docutils literal notranslate"><span class="pre">BoundedSemaphore</span></code></a> for a safer version that prevents some classes of bugs. If unsure, most users should opt for <a class="reference internal" href="#gevent.lock.BoundedSemaphore" title="gevent.lock.BoundedSemaphore"><code class="xref py py-obj docutils literal notranslate"><span class="pre">BoundedSemaphore</span></code></a>.</p> </div> <p>A semaphore manages a counter representing the number of <a class="reference internal" href="#gevent.lock.Semaphore.release" title="gevent.lock.Semaphore.release"><code class="xref py py-obj docutils literal notranslate"><span class="pre">release</span></code></a> calls minus the number of <a class="reference internal" href="#gevent.lock.Semaphore.acquire" title="gevent.lock.Semaphore.acquire"><code class="xref py py-obj docutils literal notranslate"><span class="pre">acquire</span></code></a> calls, plus an initial value. The <a class="reference internal" href="#gevent.lock.Semaphore.acquire" title="gevent.lock.Semaphore.acquire"><code class="xref py py-obj docutils literal notranslate"><span class="pre">acquire</span></code></a> method blocks if necessary until it can return without making the counter negative. A semaphore does not track ownership by greenlets; any greenlet can call <a class="reference internal" href="#gevent.lock.Semaphore.release" title="gevent.lock.Semaphore.release"><code class="xref py py-obj docutils literal notranslate"><span class="pre">release</span></code></a>, whether or not it has previously called <a class="reference internal" href="#gevent.lock.Semaphore.acquire" title="gevent.lock.Semaphore.acquire"><code class="xref py py-obj docutils literal notranslate"><span class="pre">acquire</span></code></a>.</p> <p>If not given, <code class="docutils literal notranslate"><span class="pre">value</span></code> defaults to 1.</p> <p>The semaphore is a context manager and can be used in <code class="docutils literal notranslate"><span class="pre">with</span></code> statements.</p> <p>This Semaphore’s <code class="docutils literal notranslate"><span class="pre">__exit__</span></code> method does not call the trace function on CPython, but does under PyPy.</p> <div class="versionchanged"> <p><span class="versionmodified changed">Changed in version 1.4.0: </span>Document that the order in which waiters are awakened is not specified. It was not specified previously, but due to CPython implementation quirks usually went in FIFO order.</p> </div> <div class="versionchanged"> <p><span class="versionmodified changed">Changed in version 1.5a3: </span>Waiting greenlets are now awakened in the order in which they waited.</p> </div> <div class="versionchanged"> <p><span class="versionmodified changed">Changed in version 1.5a3: </span>The low-level <code class="docutils literal notranslate"><span class="pre">rawlink</span></code> method (most users won’t use this) now automatically unlinks waiters before calling them.</p> </div> <div class="versionchanged"> <p><span class="versionmodified changed">Changed in version 20.12.0: </span>Improved support for multi-threaded usage. When multi-threaded usage is detected, instances will no longer create the thread’s hub if it’s not present.</p> </div> <div class="versionchanged"> <p><span class="versionmodified changed">Changed in version 24.2.1: </span>Uses Python 3 native lock timeouts for cross-thread operations instead of spinning.</p> </div> <dl class="py method"> <dt class="sig sig-object py" id="gevent.lock.Semaphore.acquire"> <span class="sig-name descname"><span class="pre">acquire</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">blocking</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">True</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">timeout</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><a class="reference external" href="https://docs.python.org/3/library/functions.html#bool" title="(in Python v3.13)"><span class="pre">bool</span></a></span></span><a class="headerlink" href="#gevent.lock.Semaphore.acquire" title="Link to this definition">¶</a></dt> <dd><p>Acquire the semaphore.</p> <div class="admonition note"> <p class="admonition-title">Note</p> <p>If this semaphore was initialized with a <em>value</em> of 0, this method will block forever (unless a timeout is given or blocking is set to false).</p> </div> <dl class="field-list simple"> <dt class="field-odd">Parameters<span class="colon">:</span></dt> <dd class="field-odd"><ul class="simple"> <li><p><strong>blocking</strong> (<a class="reference external" href="https://docs.python.org/3/library/functions.html#bool" title="(in Python v3.13)"><em>bool</em></a>) – If True (the default), this function will block until the semaphore is acquired.</p></li> <li><p><strong>timeout</strong> (<a class="reference external" href="https://docs.python.org/3/library/functions.html#float" title="(in Python v3.13)"><em>float</em></a>) – If given, and <em>blocking</em> is true, specifies the maximum amount of seconds this method will block.</p></li> </ul> </dd> <dt class="field-even">Returns<span class="colon">:</span></dt> <dd class="field-even"><p>A <a class="reference external" href="https://docs.python.org/3/library/functions.html#bool" title="(in Python v3.13)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">bool</span></code></a> indicating whether the semaphore was acquired. If <code class="docutils literal notranslate"><span class="pre">blocking</span></code> is True and <code class="docutils literal notranslate"><span class="pre">timeout</span></code> is None (the default), then (so long as this semaphore was initialized with a size greater than 0) this will always return True. If a timeout was given, and it expired before the semaphore was acquired, False will be returned. (Note that this can still raise a <code class="docutils literal notranslate"><span class="pre">Timeout</span></code> exception, if some other caller had already started a timer.)</p> </dd> </dl> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="gevent.lock.Semaphore.locked"> <span class="sig-name descname"><span class="pre">locked</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="../_modules/gevent/_semaphore.html#Semaphore.locked"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#gevent.lock.Semaphore.locked" title="Link to this definition">¶</a></dt> <dd><p>Return a boolean indicating whether the semaphore can be acquired (<a class="reference external" href="https://docs.python.org/3/library/constants.html#False" title="(in Python v3.13)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">False</span></code></a> if the semaphore <em>can</em> be acquired). Most useful with binary semaphores (those with an initial value of 1).</p> <dl class="field-list simple"> <dt class="field-odd">Return type<span class="colon">:</span></dt> <dd class="field-odd"><p><a class="reference external" href="https://docs.python.org/3/library/functions.html#bool" title="(in Python v3.13)">bool</a></p> </dd> </dl> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="gevent.lock.Semaphore.rawlink"> <span class="sig-name descname"><span class="pre">rawlink</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">callback</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#gevent.lock.Semaphore.rawlink" title="Link to this definition">¶</a></dt> <dd><p>Register a callback to call when this object is ready.</p> <p><em>callback</em> will be called in the <a class="reference internal" href="gevent.hub.html#gevent.hub.Hub" title="gevent.hub.Hub"><code class="xref py py-class docutils literal notranslate"><span class="pre">Hub</span></code></a>, so it must not use blocking gevent API. <em>callback</em> will be passed one argument: this instance.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="gevent.lock.Semaphore.ready"> <span class="sig-name descname"><span class="pre">ready</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="../_modules/gevent/_semaphore.html#Semaphore.ready"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#gevent.lock.Semaphore.ready" title="Link to this definition">¶</a></dt> <dd><p>Return a boolean indicating whether the semaphore can be acquired (<a class="reference external" href="https://docs.python.org/3/library/constants.html#True" title="(in Python v3.13)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">True</span></code></a> if the semaphore can be acquired).</p> <dl class="field-list simple"> <dt class="field-odd">Return type<span class="colon">:</span></dt> <dd class="field-odd"><p><a class="reference external" href="https://docs.python.org/3/library/functions.html#bool" title="(in Python v3.13)">bool</a></p> </dd> </dl> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="gevent.lock.Semaphore.release"> <span class="sig-name descname"><span class="pre">release</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#gevent.lock.Semaphore.release" title="Link to this definition">¶</a></dt> <dd><p>Release the semaphore, notifying any waiters if needed. There is no return value.</p> <div class="admonition note"> <p class="admonition-title">Note</p> <p>This can be used to over-release the semaphore. (Release more times than it has been acquired or was initially created with.)</p> <p>This is usually a sign of a bug, but under some circumstances it can be used deliberately, for example, to model the arrival of additional resources.</p> </div> <dl class="field-list simple"> <dt class="field-odd">Return type<span class="colon">:</span></dt> <dd class="field-odd"><p>None</p> </dd> </dl> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="gevent.lock.Semaphore.unlink"> <span class="sig-name descname"><span class="pre">unlink</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">callback</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#gevent.lock.Semaphore.unlink" title="Link to this definition">¶</a></dt> <dd><p>Remove the callback set by <a class="reference internal" href="#gevent.lock.Semaphore.rawlink" title="gevent.lock.Semaphore.rawlink"><code class="xref py py-meth docutils literal notranslate"><span class="pre">rawlink()</span></code></a></p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="gevent.lock.Semaphore.wait"> <span class="sig-name descname"><span class="pre">wait</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">timeout</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#gevent.lock.Semaphore.wait" title="Link to this definition">¶</a></dt> <dd><p>Wait until it is possible to acquire this semaphore, or until the optional <em>timeout</em> elapses.</p> <div class="admonition note"> <p class="admonition-title">Note</p> <p>If this semaphore was initialized with a <em>value</em> of 0, this method will block forever if no timeout is given.</p> </div> <dl class="field-list simple"> <dt class="field-odd">Parameters<span class="colon">:</span></dt> <dd class="field-odd"><p><strong>timeout</strong> (<a class="reference external" href="https://docs.python.org/3/library/functions.html#float" title="(in Python v3.13)"><em>float</em></a>) – If given, specifies the maximum amount of seconds this method will block.</p> </dd> <dt class="field-even">Returns<span class="colon">:</span></dt> <dd class="field-even"><p>A number indicating how many times the semaphore can be acquired before blocking. <em>This could be 0,</em> if other waiters acquired the semaphore.</p> </dd> <dt class="field-odd">Return type<span class="colon">:</span></dt> <dd class="field-odd"><p><a class="reference external" href="https://docs.python.org/3/library/functions.html#int" title="(in Python v3.13)">int</a></p> </dd> </dl> </dd></dl> </dd></dl> </section> </article> </div> <footer> <div class="related-pages"> <a class="next-page" href="gevent.hub.html"> <div class="page-info"> <div class="context"> <span>Next</span> </div> <div class="title"><code class="docutils literal notranslate"><span class="pre">gevent.hub</span></code> - The Event Loop and the Hub</div> </div> <svg class="furo-related-icon"><use href="#svg-arrow-right"></use></svg> </a> <a class="prev-page" href="gevent.local.html"> <svg class="furo-related-icon"><use href="#svg-arrow-right"></use></svg> <div class="page-info"> <div class="context"> <span>Previous</span> </div> <div class="title"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.local</span></code> – Greenlet-local objects</div> </div> </a> </div> <div class="bottom-of-page"> <div class="left-details"> <div class="copyright"> Copyright © 2009-2023, gevent contributors </div> Made with <a href="https://www.sphinx-doc.org/">Sphinx</a> and <a class="muted-link" href="https://pradyunsg.me">@pradyunsg</a>'s <a href="https://github.com/pradyunsg/furo">Furo</a> </div> <div class="right-details"> </div> </div> </footer> </div> <aside class="toc-drawer"> <div class="toc-sticky toc-scroll"> <div class="toc-title-container"> <span class="toc-title"> On this page </span> </div> <div class="toc-tree-container"> <div class="toc-tree"> <ul> <li><a class="reference internal" href="#"><code class="xref py py-mod docutils literal notranslate"><span class="pre">gevent.lock</span></code> – Locking primitives</a><ul> <li><a class="reference internal" href="#gevent.lock.BoundedSemaphore"><code class="docutils literal notranslate"><span class="pre">BoundedSemaphore</span></code></a><ul> <li><a class="reference internal" href="#gevent.lock.BoundedSemaphore.acquire"><code class="docutils literal notranslate"><span class="pre">BoundedSemaphore.acquire()</span></code></a></li> <li><a class="reference internal" href="#gevent.lock.BoundedSemaphore.locked"><code class="docutils literal notranslate"><span class="pre">BoundedSemaphore.locked()</span></code></a></li> <li><a class="reference internal" href="#gevent.lock.BoundedSemaphore.rawlink"><code class="docutils literal notranslate"><span class="pre">BoundedSemaphore.rawlink()</span></code></a></li> <li><a class="reference internal" href="#gevent.lock.BoundedSemaphore.ready"><code class="docutils literal notranslate"><span class="pre">BoundedSemaphore.ready()</span></code></a></li> <li><a class="reference internal" href="#gevent.lock.BoundedSemaphore.release"><code class="docutils literal notranslate"><span class="pre">BoundedSemaphore.release()</span></code></a></li> <li><a class="reference internal" href="#gevent.lock.BoundedSemaphore.unlink"><code class="docutils literal notranslate"><span class="pre">BoundedSemaphore.unlink()</span></code></a></li> <li><a class="reference internal" href="#gevent.lock.BoundedSemaphore.wait"><code class="docutils literal notranslate"><span class="pre">BoundedSemaphore.wait()</span></code></a></li> </ul> </li> <li><a class="reference internal" href="#gevent.lock.DummySemaphore"><code class="docutils literal notranslate"><span class="pre">DummySemaphore</span></code></a><ul> <li><a class="reference internal" href="#gevent.lock.DummySemaphore.acquire"><code class="docutils literal notranslate"><span class="pre">DummySemaphore.acquire()</span></code></a></li> <li><a class="reference internal" href="#gevent.lock.DummySemaphore.locked"><code class="docutils literal notranslate"><span class="pre">DummySemaphore.locked()</span></code></a></li> <li><a class="reference internal" href="#gevent.lock.DummySemaphore.ready"><code class="docutils literal notranslate"><span class="pre">DummySemaphore.ready()</span></code></a></li> <li><a class="reference internal" href="#gevent.lock.DummySemaphore.release"><code class="docutils literal notranslate"><span class="pre">DummySemaphore.release()</span></code></a></li> <li><a class="reference internal" href="#gevent.lock.DummySemaphore.wait"><code class="docutils literal notranslate"><span class="pre">DummySemaphore.wait()</span></code></a></li> </ul> </li> <li><a class="reference internal" href="#gevent.lock.RLock"><code class="docutils literal notranslate"><span class="pre">RLock</span></code></a><ul> <li><a class="reference internal" href="#gevent.lock.RLock.acquire"><code class="docutils literal notranslate"><span class="pre">RLock.acquire()</span></code></a></li> <li><a class="reference internal" href="#gevent.lock.RLock.release"><code class="docutils literal notranslate"><span class="pre">RLock.release()</span></code></a></li> </ul> </li> <li><a class="reference internal" href="#gevent.lock.Semaphore"><code class="docutils literal notranslate"><span class="pre">Semaphore</span></code></a><ul> <li><a class="reference internal" href="#gevent.lock.Semaphore.acquire"><code class="docutils literal notranslate"><span class="pre">Semaphore.acquire()</span></code></a></li> <li><a class="reference internal" href="#gevent.lock.Semaphore.locked"><code class="docutils literal notranslate"><span class="pre">Semaphore.locked()</span></code></a></li> <li><a class="reference internal" href="#gevent.lock.Semaphore.rawlink"><code class="docutils literal notranslate"><span class="pre">Semaphore.rawlink()</span></code></a></li> <li><a class="reference internal" href="#gevent.lock.Semaphore.ready"><code class="docutils literal notranslate"><span class="pre">Semaphore.ready()</span></code></a></li> <li><a class="reference internal" href="#gevent.lock.Semaphore.release"><code class="docutils literal notranslate"><span class="pre">Semaphore.release()</span></code></a></li> <li><a class="reference internal" href="#gevent.lock.Semaphore.unlink"><code class="docutils literal notranslate"><span class="pre">Semaphore.unlink()</span></code></a></li> <li><a class="reference internal" href="#gevent.lock.Semaphore.wait"><code class="docutils literal notranslate"><span class="pre">Semaphore.wait()</span></code></a></li> </ul> </li> </ul> </li> </ul> </div> </div> </div> </aside> </div> </div><script src="../_static/documentation_options.js?v=32fdf4fc"></script> <script src="../_static/doctools.js?v=9bcbadda"></script> <script src="../_static/sphinx_highlight.js?v=dc90522c"></script> <script src="../_static/scripts/furo.js?v=5fa4622c"></script> </body> </html>